Actual sea surface water temperatures close to shore at Oshawa can vary by several degrees compared with these open water averages. Surfers should use a 2mm long sleeve shorty or a 3/2mm spring wetsuit if the wind is up. Max ºC Max ºF Min ºC Min ºF Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0ºC 6ºC 12ºC 18ºC 24ºC 30ºC 7 day tide forecast for Oshawa Monthly average max / min water temperatures The graph below shows the range of monthly Oshawa water temperature derived from many years of historical sea surface temperature data. Sea temperatures (20 °C) warm too. Lake Ontario - 45012 * 03:00 AM EDT 09 August 2020 Buoy position: 43.62N 77.4W This table is a summary of hourly weather conditions for the weather station or buoy. Surfers should use a 2mm long sleeve shorty or a 3/2mm spring wetsuit if the wind is up. At this time the average water temperature of the area is consistently above 62°F, so going for a swim will not require thermal wetsuits! The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.The graph below shows the range of monthly Oshawa water temperature derived from many years of historical sea surface temperature data.These average ocean temperatures for Oshawa are calculated from several years of archived data.Whilst sea temperatures for Oshawa are as accurate as current data allows, there may be slight local and regional variations depending on conditions. Staying warm in the water won't be a problem in board-shorts, but wear at least a rash-vest to keep the UV off. Due to its geographical location, temperature in Ontario can range from 86°F down to -40°F. The measurements for the water temperature in Oshawa, Ontario are provided by the daily satellite readings provided by the NOAA. In August, the highest average water temperature for this place is reached with on average 21.80°C | 71.24°F. The coldest sea temperatures at Oshawa mean that you will need a flexible 6/5/4mm wetsuit or a well fitting 5/4mm wetsuit with gloves and 5mm neoprene booties and a hood to surf here in mid February. Whereas in March the lowest average water temperature is measured at 2.70°C | 36.86°F. We have calculated the average water temperature variation around the year as well as the extremes that have been observed on each date.All of the graphs for the surf breaks presented on Surf-Forecast.com are on the same scale to enable comparison between locations around the world.Oshawa sea temperatures peak in the range 18 to 24°C (64 to 75°F) on around the 8th of August and are at their coldest on about the 15th of February, in the range 1 to 2°C (34 to 36°F). Refer to our detailed weather forecasts for this information.Sunny with very warm air temperatures, feeling like 25 °C once we account for any wind. Air temperature, wind-chill and sunshine should also be considered before deciding on the kind of wetsuit needed to stay warm when surfing at Oshawa. Offshore winds cause colder deep water to replace surface water that has been warmed by the sun. Oshawa sea temperatures are maximum in early to mid August. Use the tab navigation above to view Oshawa sea temperature, Oshawa photographs, Oshawa detailed swell predictions, wind and weather forecasts, Oshawa webcams, current wind from Lake Ontario live weather stations and Oshawa tide predictions. Below is a graph of Historical Sea Surface Temperature for Oshawa. The Canada swell maps link will open up the big picture showing Canada and the surrounding seas. This has been derived from analysis of two decades of oceanographic satellite measurements of nearby open water. Time of day and wind direction may have a temporary local effect as can water flows from neraby rivers.Map showing location of Oshawa (43.900120, -78.849570) Oshawa sea temperatures are maximum in early to mid August. The best time of year to visit Ontario and its many lakes would be between late May and mid-October. In Oshawa, the annual water temperature (Lake Ontario) is on average 10.20°C | 50.36°F. This is especially true after heavy rain, close to river mouths or after long periods of strong offshore winds. Oshawa sea temperatures peak in the range 18 to 24°C (64 to 75°F) on around the 8th of August and are at their coldest on about the 15th of February, in the range 1 to 2°C (34 to 36°F).